FRONT POWER SEAT CONTROL SYSTEM (w/ Memory), Diagnostic DTC:B2653

DTC Code DTC Name
B2653 Lifter Sensor Malfunction

DESCRIPTION

When the front power seat switch (for driver) or front power seat switch (for front passenger) do not receive a sensor signal despite upward or downward movement of the seat by power seat motor operation, this DTC is stored.

DTC Code DTC Detection Condition Trouble Area
B2653 The upward and downward lock detection position of the sensor is the same.

  • for Driver


    • Front power seat switch (for driver)


    • Lifter motor (front seat adjuster assembly (for driver))


    • Wire harness or connector


  • for Front Passenger


    • Front power seat switch (for front passenger)


    • Lifter motor (front seat adjuster assembly (for front passenger))


    • Wire harness or connector

WIRING DIAGRAM


  1. for Driver

    A01G8GJE07

  2. for Front Passenger

    A01G8GJE08

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC output from "Driver Seat" B
      DTC output from "Passenger Seat" C

    B

    PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR) Click here

    C

    PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR) Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  2. PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    5. Perform the Active Test according to the display on the GTS.

      Driver Seat
      Tester Display Test Part Control Range Diagnostic Note
      Lifter Operation Seat lifter operation OFF/Up/Down -
      OK
      Motor operates normally.

    NG

    INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR DRIVER)) Click here

    OK

  3. CHECK FRONT POWER SEAT SWITCH (FOR DRIVER) (LIFTER MOTOR CIRCUIT)


    1. Disconnect the X3*1 or W3*2 lifter motor connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      X3-2 - X3-3 Lifter switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Condition Specified Condition
      W3-2 - W3-3 Lifter switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR DRIVER) - LIFTER MOTOR) Click here

    OK

  4. CHECK LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR DRIVER))


    1. A01G781E15
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Lifter Motor (Front Seat Adjuster Assembly (for Driver)))

      Reconnect the X3*1 or W3*2 lifter motor connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      X3-2 - Body ground Lifter switch on 4.5 to 4.8 V
      for RHD
      Tester Connection Condition Specified Condition
      W3-2 - Body ground Lifter switch on 4.5 to 4.8 V

    NG

    REPLACE LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR DRIVER)) Click here

    OK

    REPLACE FRONT POWER SEAT SWITCH (FOR DRIVER) Click here

  5. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR DRIVER) - LIFTER MOTOR)


    1. Disconnect the X10*1 or W10*2 front power seat switch (for driver) connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      X10-4 (SSRL) - X3-2 Always Below 1 Ω
      X10-1 (SGND) - X3-3 Always Below 1 Ω
      X10-4 (SSRL) - Body ground Always 10 kΩ or higher
      X10-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W10-4 (SSRL) - W3-2 Always Below 1 Ω
      W10-1 (SGND) - W3-3 Always Below 1 Ω
      W10-4 (SSRL) - Body ground Always 10 kΩ or higher
      W10-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH (FOR DRIVER) Click here

  6. INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR DRIVER))


    1. A01G5F6E14
      Text in Illustration
      *a

      Component without harness connected

      (Lifter Motor (Front Seat Adjuster Assembly (for Driver)))

      Disconnect the X3*1 or W3*2 lifter motor connector.


      • *1: for LHD

      • *2: for RHD

    2. Check if the seat cushion moves smoothly when the battery is connected to the lifter motor connector terminals.

      OK
      Condition Operational Direction

      Battery positive (+) → Terminal 4

      Battery negative (-) → Terminal 1

      		 Seat cushion moves downward

      Battery positive (+) → Terminal 1

      Battery negative (-) → Terminal 4

      		 Seat cushion moves upward

    NG

    REPLACE LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR DRIVER)) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR DRIVER) - LIFTER MOTOR)


    1. Disconnect the X9*1 or W9*2 front power seat switch (for driver) connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      X9-10 (LFT+) - X3-1 Always Below 1 Ω
      X9-12 (LFT-) - X3-4 Always Below 1 Ω
      X9-10 (LFT+) - Body ground Always 10 kΩ or higher
      X9-12 (LFT-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W9-10 (LFT+) - W3-1 Always Below 1 Ω
      W9-12 (LFT-) - W3-4 Always Below 1 Ω
      W9-10 (LFT+) - Body ground Always 10 kΩ or higher
      W9-12 (LFT-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH (FOR DRIVER) Click here

  8. PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Passenger Seat / Active Test.

    5. Perform the Active Test according to the display on the GTS.

      Passenger Seat
      Tester Display Test Part Control Range Diagnostic Note
      Lifter Operation Seat lifter operation OFF/Up/Down -
      OK
      Motor operates normally.

    NG

    INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR FRONT PASSENGER)) Click here

    OK

  9. CHECK FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) (LIFTER MOTOR CIRCUIT)


    1. Disconnect the W3*1 or X3*2 lifter motor connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      W3-2 - W3-3 Lifter switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Condition Specified Condition
      X3-2 - X3-3 Lifter switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) - LIFTER MOTOR) Click here

    OK

  10. CHECK LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR FRONT PASSENGER))


    1. A01G781E16
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Lifter Motor (Front Seat Adjuster Assembly (for Front Passenger)))

      Reconnect the W3*1 or X3*2 lifter motor connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      W3-2 - Body ground Lifter switch on 4.5 to 4.8 V
      for RHD
      Tester Connection Condition Specified Condition
      X3-2 - Body ground Lifter switch on 4.5 to 4.8 V

    NG

    REPLACE LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR FRONT PASSENGER)) Click here

    OK

    REPLACE FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) Click here

  11. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) - LIFTER MOTOR)


    1. Disconnect the W10*1 or X10*2 front power seat switch (for front passenger) connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W10-4 (SSRL) - W3-2 Always Below 1 Ω
      W10-1 (SGND) - W3-3 Always Below 1 Ω
      W10-4 (SSRL) - Body ground Always 10 kΩ or higher
      W10-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      X10-4 (SSRL) - X3-2 Always Below 1 Ω
      X10-1 (SGND) - X3-3 Always Below 1 Ω
      X10-4 (SSRL) - Body ground Always 10 kΩ or higher
      X10-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) Click here

  12. INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR FRONT PASSENGER))


    1. A01G5F6E14
      Text in Illustration
      *a

      Component without harness connected

      (Lifter Motor (Front Seat Adjuster Assembly (for Front Passenger)))

      Disconnect the W3*1 or X3*2 lifter motor connector.


      • *1: for LHD

      • *2: for RHD

    2. Check if the seat cushion moves smoothly when the battery is connected to the lifter motor connector terminals.

      OK
      Condition Operational Direction

      Battery positive (+) → Terminal 4

      Battery negative (-) → Terminal 1

      		 Seat cushion moves downward

      Battery positive (+) → Terminal 1

      Battery negative (-) → Terminal 4

      		 Seat cushion moves upward

    NG

    REPLACE LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FOR FRONT PASSENGER)) Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) - LIFTER MOTOR)


    1. Disconnect the W9*1 or X9*2 front power seat switch (for front passenger) connector.


      • *1: for LHD

      • *2: for RHD

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W9-10 (LFT+) - W3-1 Always Below 1 Ω
      W9-12 (LFT-) - W3-4 Always Below 1 Ω
      W9-10 (LFT+) - Body ground Always 10 kΩ or higher
      W9-12 (LFT-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      X9-10 (LFT+) - X3-1 Always Below 1 Ω
      X9-12 (LFT-) - X3-4 Always Below 1 Ω
      X9-10 (LFT+) - Body ground Always 10 kΩ or higher
      X9-12 (LFT-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) Click here